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Is basically a software solution to enable producers of content to restrict what consumers can do with it.
The producers try to spin it, with the \'rights\' supposed to indicate that you the consumer can do more with the content. However in 100% of the DRM used today, it is used to restrict what you can do with the content.
Two examples of DRM are the Apple iTunes Store (if you buy one of the songs you can\'t play it on every device you might own), and DVD\'s Region Coding (American DVD\'s shouldn\'t work in UK players).
The problem is that the big companies can buy laws that are in their favour, the consumer on the other hand just gets screwed over time and time again.
Digital rights management (DRM) refers to a range of access control technologies that limit usage of digital media or devices. It has been used by some big companies to protect their intellectual property rights, such as Sony, Apple Inc., Microsoft and so on. Songs bought from different companies will have different DRM protection that can restrict you from playing songs on incompatible players.
For example, if you downloaded a protected music from Microsoft Zune that has windows DRM, you can only play the music on Zune player. If you accidently bought a PSP, you just can’t play the music on your new player.
Also, DRM restrict the usage of computers, so you just can’t share you DRM-laden music with your friends.